IP Prefix Advertisement in EVPN draft-rabadan-l2vpn-evpn-prefix-advertisement-01 Jorge Rabadan Wim Hendericks Florin Balus Senad Palislamovic Aldrin Isaac IETF 88, November 2013 Vancouver, Canada
The prefix-advertisement route (route-type 5) • RT 2 (MAC-advertisement) used for advertising Route-types: MACs and MAC-IP for ARP resolution) 1- Ethernet A-D route - Also used for MAC Mobility 2- MAC-advertisement route • RT 5 (IP-prefix) used to advertise Prefixes 3- Inclusive Multicast route independently of the mac-advertisement routes 4- Ethernet Segment route • Possible Prefix next-hops in the overlay topology 5- IP Prefix route (OPTIONAL) - ESI, IRB IP address, Floating IP address Route-type 5 specific content draft-rabadan-l2vpn-evpn-prefix-advertisement-01 IETF88 – Nov 2013
Use-case #1: TS IP address next-hop use-case TS2 (VA) VM NVE2 DGW-1 FW-2 EVI-10 EVI-10 VRF IP2/M2 IRB1 SN1 VXLAN/ WAN NVGRE IP3/M3 EVI-10 VRF EVI-10 FW-3 IRB2 TS3 (VA) NVE3 DGW-2 ESI=0 VNI=1 M3 / IP3 evpn RT=2 ESI=0 VNI=1 SN1 /24 GW IP=IP3 evpn RT=5 draft-rabadan-l2vpn-evpn-prefix-advertisement-01 IETF88 – Nov 2013
Use-case #2: floating IP address use-case ESI=0 VNI=1 SN1 /24 GW IP=IP23 evpn RT=5 ESI=0 VNI=1 M2 / IP23 evpn RT=2 TS2 (VA) VM NVE2 (ACTIVE) DGW-1 FW-2 EVI-10 IP2/M2 EVI-10 VRF IRB1 SN1 vIP23 (floating) VXLAN/ WAN NVGRE IP3/M3 EVI-10 VRF EVI-10 FW-3 IRB2 TS3 (VA) NVE3 DGW-2 ESI=0 VNI=1 SN1 /24 GW IP=IP23 evpn RT=5 draft-rabadan-l2vpn-evpn-prefix-advertisement-01 IETF88 – Nov 2013
Use-case #3: IRB IP next-hop use-case ESI=0 VNI=1 SN1 /24 GW IP=IRB3 evpn RT=5 ESI=0 VNI=1 M2 / IRB3 evpn RT=2 VM NVE2 DGW-1 VRF EVI-10 EVI-10 VRF IRB3 EVI-2 IRB1 VXLAN/ WAN SN1 NVGRE IRB4 VRF EVI-10 VRF EVI-10 IRB2 EVI-2 NVE3 DGW-2 draft-rabadan-l2vpn-evpn-prefix-advertisement-01 IETF88 – Nov 2013
Use-case #4: “bump-in-the-wire” use-case (new) ESI=23 VNI=10 SN1 /24 GW IP=0 evpn RT=5 ESI=23 VNI=10 evpn RT=1 VA VM NVE2 DGW-1 (ACTIVE) FW EVI-10 VM FW EVI-10 VRF VM1 IRB1 SN1 ESI23 VXLAN/ WAN NVGRE VM VM2 EVI-10 VRF EVI-10 FW-3 IRB2 FW-3 NVE3 VA DGW-2 ESI=23 VNI=10 SN1 /24 GW IP=0 evpn RT=5 draft-rabadan-l2vpn-evpn-prefix-advertisement-01 IETF88 – Nov 2013
The prefix-advertisement route benefits • Clean identification of a prefix • NVEs running EVPN but not supporting the OPTIONAL prefix- advertisement route can easily identify it an ignore it without processing the route • No MAC information is compared by BGP when selecting routes • Flexible overlay next-hop (IRB, floating IP , ESI) addressing different end-point types • Decouples prefix-advertisement from mac mobility procedures • Supports VA resiliency procedures draft-rabadan-l2vpn-evpn-prefix-advertisement-01 IETF88 – Nov 2013
Next steps • Feedback from WG draft-rabadan-l2vpn-evpn-prefix-advertisement-01 IETF88 – Nov 2013
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